The answer is humor! It’s been shown it helps with all of those mentioned benefits :)
The actual material being printed on is usually paper which is out of wood, how ever the printer may be made out of metal, and I am confused on which one you are asking about.
Answer:
B
Explanation:
B was recorded in 1925, a few decades before the others.
Fresco Secco. In the dry plaster or "fresco secco" technique, pigments are usually mixed with water, although other substances might also be used. The paint is then applied to a dry plaster wall which has been wetted down with water.
